var req_realize_sys = getItemValueAsString("sxxt_1"); //系统
var req_realize_sys_son = getItemValueAsString("sxzxt_1"); //子系统
var name = "";
if (isNotNull(req_realize_sys_son)) {
    name = req_realize_sys + "-" + req_realize_sys_son;
} else {
    name = req_realize_sys;
}
var sql = "SELECT * FROM tlk_instance_name WHERE ITEM_SYSTEM_NAME = '" + name + "'";
var datas = queryBySQL(sql);
var opts = "";
if (datas != null && datas.size() > 0) {
    var iter = datas.iterator();
    while (iter.hasNext()) {
        var doc = iter.next();
        var instance_name = doc.getItemValueAsString("instance_name");
        opts += ";" + instance_name;
    }
}
opts;